- Other cancer for which more than 5 years have passed since chemotherapy was completed and disease-free status has been maintained for 5 years or more 5. Gastric or gastroesophageal junction adenocarcinoma with distant metastasis (M1) including distant lymph node (behind the pancreas, along the aorta, portal vein, behind the peritoneum, mesenteric lymph node) 6. Residual cancer on post-operative staging (R1 and R2 resection) 7. Patients who received alleviator, adjuvant chemotherapy, or neoadjuvant chemotherapy and/or radiotherapy and/or immunotherapy in the past for treatment of gastric cancer 8. Patients who participated in another clinical trial or received another investigational product within 30 days prior to providing informed consent 9. Any of the following within 6 months prior to the study recruitment: Myocardial infarction, severe/unstable angina, coronary/peripheral artery bypass, NYHA class III or IV congestive heart failure, stroke or transient ischemic attack, serious cardiac arrhythmia requiring treatment.